XML Formatter & Validator
XML Formatter & Validator checks your XML is well-formed, pretty-prints it with clean 2-space indentation, and can minify it back to a single line. Comments, CDATA and declarations are preserved.
Last updated: July 2026
An XML formatter checks that your document is well-formed and pretty-prints it with two-space indentation, preserving comments, CDATA sections and declarations. Invalid XML shows the parser's error message so you can fix it fast. One click also minifies XML by stripping inter-tag whitespace. Everything runs locally in your browser.
How to use XML Formatter & Validator
- Paste your XML document.
- Click “Format / Validate” to beautify or “Minify” to compact.
- Read the valid/invalid status, then copy or download the result.
Frequently asked questions
How does validation work?
The XML is parsed with your browser's native parser. If it isn't well-formed, the exact parser error message is shown so you can locate the problem.
Are comments and CDATA preserved?
Yes — comments, CDATA sections, processing instructions and the XML declaration all pass through formatting unchanged.
Is my XML uploaded?
No — validation and formatting run entirely in your browser.
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